test with :) chen songyong

Transcription

1 test with :) chen songyong

2 about me

3 about me Remote worker! Worked in start-ups, web consultancies, banks and digital in Twitter & Github

4 test in old days

5 test in old days

6

7 do you write test?

8 do you write test?

9 Q & A

10 why you test Forget to go for test first

11 why you test Forget to go for test first

12 technical debt

13 technical debt "we have not found anything to ease the transition from 'hairball of code with no unit tests' to 'unit-testable code'."

14 technical debt "we have not found anything to ease the transition from 'hairball of code with no unit tests' to 'unit-testable code'."

15 trust your mind code

16 my practice

17 my practice integration test

18 my practice integration test controller test

19 my practice integration test controller test model / lib test

20 my practice

21 my practice

22 my practice Test

23 my practice Test Implementation

24 my practice Test Implementation Pay button works

25 my practice Test Implementation Pay button works

26 my practice Test Implementation Pay button works views

27 my practice Test Implementation Pay button works views

28 my practice Test Implementation Pay button works views controller deals with pay request

29 my practice Test Implementation Pay button works views controller deals with pay request

30 my practice Test Implementation Pay button works views controller deals with pay request controller

31 my practice Test Implementation Pay button works views controller deals with pay request controller

32 my practice Test Implementation Pay button works views controller deals with pay request controller model/lib makes the transaction

33 my practice Test Implementation Pay button works views controller deals with pay request controller model/lib makes the transaction

34 my practice Test Implementation Pay button works views controller deals with pay request controller model/lib makes the transaction model/lib

35 my practice Test Implementation Pay button works views controller deals with pay request controller model/lib makes the transaction model/lib

36 my practice Test Implementation Pay button works views controller deals with pay request controller model/lib makes the transaction pass model/lib

37 my practice Test Implementation Pay button works views controller deals with pay request controller model/lib makes the transaction pass model/lib

38 my practice Test Implementation Pay button works views controller deals with pay request pass controller model/lib makes the transaction pass model/lib

39 my practice Test Implementation Pay button works views controller deals with pay request pass controller model/lib makes the transaction pass model/lib

40 my practice Test Implementation Pay button works pass views controller deals with pay request pass controller model/lib makes the transaction pass model/lib

41 why you test Forget to write test first! Too much extra work

42 YES is it true?

43 is it true? YES Writing test adds 15-35% development time in return for a 40-90% reduction in defect density on otherwise like-for-like projects. - A paper in ESE

44 No! is it true?

45 is it true? No! v.s. test in rails console

46 why you test Forget to write test first! Extra work! Maintenance is painful

47

48 it 'Sign Up should have title' do! visit '/tc/'! page.find('div#sign-up-modal').should have_css( #modalheader.h5-sign-up-header, :text => Apple Now )! end

49 it 'Sign Up should have title' do! visit '/tc/'! page.find('div#sign-up-modal').should have_css( #modalheader.h5-sign-up-header, :text => Apple Now )! end

50 why you test Forget to write test first! Extra work! Maintenance is painful! Running test takes longer and longer

51 why you test Forget to write test first! Extra work! Maintenance is painful! Running test takes longer and longer

52 easiest way to go

53 easiest way to go CPU!! Data storage!! Memory

54 easiest way to go CPU!! Data storage!! Memory

55 test suite example

56 test suite example ruby / rails / rspec-rails ~>2.0 / PostgreSQL /Factory Girl / Database cleaner

57 test suite example ruby / rails / rspec-rails ~>2.0 / PostgreSQL /Factory Girl / Database cleaner 370+ mixed with unit test, integration test (w/ capybara inc. JavaScript)

58 test suite example ruby / rails / rspec-rails ~>2.0 / PostgreSQL /Factory Girl / Database cleaner 370+ mixed with unit test, integration test (w/ capybara inc. JavaScript) No remote request (w/ VCR)

59 test suite example ruby / rails / rspec-rails ~>2.0 / PostgreSQL /Factory Girl / Database cleaner 370+ mixed with unit test, integration test (w/ capybara inc. JavaScript) No remote request (w/ VCR)

60 Tool / Framework Ryan Bates Railscasts spork! zeus! spring! Parallel test! Guard!

61 Tool / Framework Ryan Bates Railscasts SKIP spork! zeus! spring! Parallel test! Guard!

62 rspec v.s. rake spec

63 rspec v.s. rake spec Update: run via bin/rspec

64 rspec v.s. rake spec Update: run via bin/rspec

65 rspec v.s. rake spec Update: run via bin/rspec

66 database clean strategy

67 database clean strategy :transaction

68 database clean strategy :transaction simply rollback - fastest

69 database clean strategy :transaction simply rollback - fastest Failed at:

70 database clean strategy :transaction simply rollback - fastest Failed at: multiple connections

71 database clean strategy :transaction simply rollback - fastest Failed at: multiple connections integration test

72 database clean strategy

73 database clean strategy :truncation

74 database clean strategy :truncation TRUNCATE table

75 database clean strategy :truncation TRUNCATE table remove all records

76 database clean strategy :truncation TRUNCATE table remove all records VACUUM table

77 database clean strategy :truncation TRUNCATE table remove all records VACUUM table index

78 database clean strategy :truncation TRUNCATE table remove all records VACUUM table index Failed at:

79 database clean strategy :truncation TRUNCATE table remove all records VACUUM table index Failed at: concurrent access to a table

80 database clean strategy

81 database clean strategy :deletion

82 database clean strategy :deletion DELETE from table

83 database clean strategy :deletion DELETE from table scan the table

84 database clean strategy :deletion DELETE from table scan the table less predictable

85 database clean strategy :deletion DELETE from table scan the table less predictable Bad at:

86 database clean strategy :deletion DELETE from table scan the table less predictable Bad at: Large tables

87 Deletion

88 Deletion Truncation

89 database Clean strategy

90 database Clean strategy

91 refactor gemfile

92 refactor gemfile stop loading gems not used in the code

93 refactor gemfile stop loading gems not used in the code e.g. gem unicorn, require: false

94 refactor gemfile stop loading gems not used in the code e.g. gem unicorn, require: false specify dependencies for test environment

95 refactor gemfile stop loading gems not used in the code e.g. gem unicorn, require: false specify dependencies for test environment jquery-rails, will_paginate, exception_notification

96 refactor gemfile stop loading gems not used in the code e.g. gem unicorn, require: false specify dependencies for test environment jquery-rails, will_paginate, exception_notification

97 refactor gemfile stop loading gems not used in the code e.g. gem unicorn, require: false specify dependencies for test environment jquery-rails, will_paginate, exception_notification

98 defer garbage collection

99 defer garbage collection

100 defer garbage collection

101 Original + rspec command + DB clean strategy + refactor Gemfile + delay garbage collection

102 factory v.s. fixture

103 factory v.s. fixture Flexibility

104 factory v.s. fixture Flexibility

105 factory v.s. fixture Flexibility Callbacks & validations

106 factory v.s. fixture Flexibility Callbacks & validations

107 factory v.s. fixture Flexibility Callbacks & validations Speed

108 ! best practice

109 ! best practice create(:user) v.s. build(:user) v.s. build_stubbed(:user)

110 ! best practice create(:user) v.s. build(:user) v.s. build_stubbed(:user) require spec_helper v.s. require lib_class.rb

111 ! best practice create(:user) v.s. build(:user) v.s. build_stubbed(:user) require spec_helper v.s. require lib_class.rb mock/stub or not to mock/stub

112 ! best practice create(:user) v.s. build(:user) v.s. build_stubbed(:user) require spec_helper v.s. require lib_class.rb mock/stub or not to mock/stub let v.s. let! v.s. before block

113 ! best practice create(:user) v.s. build(:user) v.s. build_stubbed(:user) require spec_helper v.s. require lib_class.rb mock/stub or not to mock/stub let v.s. let! v.s. before block

114 not about speed but...

115 not about speed but... Selective testing

116 not about speed but... Selective testing slow

117 not about speed but... Selective testing slow focus

118 not about speed but... Selective testing slow focus Fail immediately --fail-fast

119 not about speed but... Selective testing slow focus Fail immediately --fail-fast Display message immediately

120 not about speed but... Selective testing slow focus Fail immediately --fail-fast Display message immediately -- format Fuubar

121 not about speed but... Selective testing slow focus Fail immediately --fail-fast Display message immediately -- format Fuubar rspec -p spec

122

123

124 (real) Q & A

125 (real) Q & A